Hello there. I know a little bit about this stuff, as I've belonged to several churches, two of which claimed to be the only true Church. I've been Lutheran, Roman Catholic, Eastern Orthodox. Two of these 3 say they're the real deal.
There was a time I agreed with Cyprian of Carthage, who wrote, "He cannot have God for his Father who does not have the Church as his Mother."
I've changed in these last few years. Today, my beliefs are a hodgepodge of various religions. I venerate nature. I chant and drum. I try to imitate Christ's message of unconditional love and mercy. And I attend an Anglo-Catholic parish. And while the Bible contains some beautiful poetry and much truth, I don't worship it as the "only" source of truth.
Which religion has it right? All of them and none of them. Our finite minds aren't capable of deciphering a power far higher than ourselves.
I believe that I will see my Christian loved ones in heaven. And my Wiccan friends, and my Buddhist friends, and my aetheist friends (who will be pleasantly surprised!). We are not "saved" from bowing to the right god, and following the right rules, but by living a life of kindness.
"And though I may not know the answers, I can finally say I am free. And if the questions led me here, then I am who I was born to be." --Susan Boyle
"If all fools could fly, the sun would be eclipsed forever." --Dutch proverb